从文本文件中一行一行读的方法

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;


public class insertCountry {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		try {
			File f = new File("D:/guojia.txt");
			FileReader fi = new FileReader(f);
			BufferedReader  fr = new BufferedReader(fi);
			try {
				String s = fr.readLine();
				System.out.println(s);
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}

}